For feeding-rolls



Li uit.

JOHN RICHARDS, OF PHILADE LIDHIA, PENNSYL VA Nl A. Letters-Patent No. 85,131,1Zctefl December 22, 186g.

The Schedule referred to in these Letters Patent and making parl'. of the same.

To all whom these lette/rs come Be it known that I, JOHN RICHARDS, of the city and county of Philadelphia, in .the State of Pennsylvania, have invented a new and useful Improvement in Expansive Gearing for Calender and'Feeding-Rolls; and I hereby declare the following to be a fulland exact description of the same, together with the mode of constructing and manner of its operation, reference being had to the drawings accompanying'and ibrmingfpart of this specification, in which- -Figure l is a perspective elevation of a pair of rolls connected by my improved system of gearing, and

Figure 2 are details of iig. 1, to aid in a more complete description.

Similar letters of reference on the different figures indicate 4corresponding parts.

The nature of this invention consists in a system of expansive gearing for adjustable rolls', wherein the wheels fixed tp the rolls rotate in different planes, thereby allowing` them to be made ci greater diameter than the rolls; also, in mounting the wheels known A as intermediates, on a pivoted radial arm, having a cylindrical extension surrounding the axis of the second wheels, thereby holding the trainof wheels Iigidly in the plane of their rotation, dispensing with the usual number of links, and also with cross-shafts extending across the machine; and inv mounting two of the wheels. on astud of suflicient length to give them a good and substantial bearing; and iinally, in so arranging the gearing, when applied at each end of the rolls, that they will act, to some degree, independent, allowing the top roll to act in Idifferent planes with reference to the lower roll, so as to ladmit of material being passed through, that is not parallel as'lto thickness; all as hereinafter fully explained.

In constructing expanding gearing-.for calender or feeding-rolls, when the train of four wheels` is used and working in the same plane, the Wheels have to be so constructed that their periphery is within the diameter' of the rolls to which they are applied; andas a coarse pitch is desirable in such gearing, the true diameter to the pitch-line is much smaller than the rolls themselves. The strain upon the .teeth being directly as the diameter of the wheels, they are. very liable to break when great or irregular strain is needed, and in cases where large wheels have been applied to the rolls, correspondingly small pinions have been used inthe train, to which the objections first cited apply.

There has also existed a ditliculty in obtaining a suftioient bearing for the axis of the intermediate wheels, unless by connecting double trains with shafts extending across from side to side, which shafts are 'often in the way of the material being fed t'o therolls, and in all cases inconvenient to the operation of the rolls.

ofthe wheels.

- left-hand.v

=to the art; but

As a general rule, thc-bearings of all intermediate gears have been in length but little more than the face To obviate these objections, and to produce a system of expansive gearing that will comprehend all necessary functions for calender-rolls, and for fccrling'-,

rolls for lumber and other machines, is the object of the invention illnstratedainl hereinafter described.

Having. thus set forth the nature andthe objects of this invention, I will now proceed to describe the manner of constructing the saine, so as to enable those skilled'in the art to make and use it with the aid of the drawings.

a a is a pair of rolls mounted in vertical supports b, l). The top roll is adjusted to and from the bottom roll by means of the screws c c and movable bearings d d, in the usual manner.

There is cast upon the framing b b thc shells c e, for receiving the cylindrical extension j' on the radial supports g g. Through this extensioln'at h, is iitted a short shaft, carrying on either end thc gears Iiy t, which are screwed on by means of a thread cnt rcverse to the course of their rotation; that is to say, the threads on one shaft are right, and on the other,

The gears m m aremounted on a stud, n, and have hubs o 0, Wof suiiicient lengthto give good and substantial bearings.

The gears m m are kept in position by the link p, only one being necessary in each train of wheels. In adjusting the top roll, this link being pivoted concentric with the two gears m and fr, and the armg beingT free to swing on its axis j, it will be readily understood that the top roll may bc adjusted to any point within the range ofthe train, or wide enough for practical purposes. There being no connection between the two trains of gearing where two are used, and the gears formed to t loosely together, the top roll 'has quite' a range of adjustment from a parallel plane, whicli is often necessary for uneven material, as hereinbefore.

cited.

Having thus explained th i nature of my invention, I do not claim the' applicatidb of gearing to both ends ofthe rolls, such arrangement l\;old and well known Vhat I do claim, and desire t Patent, is-

The combination of wheels, in the manner described, with a pair of adj ustable rolls, substantially as specified.

JOHN RICHARDS. Witnesses:

OTTO ALBRECHT, WM. H. THORNE.

`armure by Letters 

